Recording head with a multilayer spin torque element having positive and negative beta materials

A magnetic recording head, comprising:

• a main pole;
• a trailing shield;
• one or more side shields;
• a leading shield;
• and
• a spin torque element disposed between the main pole and one or more of the trailing shield, the one or more side shields, and the leading shield, the spin torque element comprising:
• a multilayer spin torque layer structure, wherein the multilayer spin torque layer structure comprises a first spin torque layer and a second spin torque layer disposed thereon, wherein the first spin torque layer comprises a negative beta material, and wherein the second spin torque layer comprises a positive beta material, wherein the first spin torque layer is disposed closer to a location where current flows from during operation as compared to the second spin torque layer;
• and
• a multilayer spacer layer structure, wherein the multilayer spacer layer structure includes at least one layer comprising ruthenium.

A magnetic recording head, comprising:

• a main pole;
• a trailing shield;
• one or more side shields;
• a leading shield;
• and
• a spin torque element disposed between the main pole and one or more of the trailing shield, the one or more side shields, and the leading shield, the spin torque element comprising:
• a first spin torque layer comprising a positive beta material;
• a second spin torque layer comprising a negative beta material disposed upon the first spin torque layer;
• and
• a third spin torque layer comprising the positive beta material disposed upon the second spin torque layer.